For testing fuel pump carburetor and transmission check auto with 2~4pcs carburetors.
.Contents:
4pcs 3-1/2" synchronizer gauges with fixed plate.
4pcs rubber hose 8 x 5 x 750mm
4pcs extension tube 3.9 x 52mm
4pcs extension tube 3.9 x 122mm 
8pcs cone type connector 8 x 40mm
4pcs adapters 10 x 53mm(M6 x 0.75)
4pcs adapters 10 x 60mm(M6 x 1.0)

Gauge specifications:
3.5" dial diameter
Pressure range 0~15psi/ 0~1kg/cm²/ 0~76cmHg/ 0~30inHg
Housing is black plated steel
Rim is black plated steel
Lens is glass
Point is white plated aluminum